Unfortunately the only one I know of for Wonderswan is one of the many emulator mods that Guest created for various consoles many years ago. While it was great he wanted to help more obscure consoles get debug tools, his debug mods are rather cumbersome to use.
That wouldn't be the Mednafen emulator, would it? I couldn't start it because of some .txt configuration missing.
This is what I get in Cheat Engine when searching for the word "However" (hex:BBDCE4D2E3D2DF, pointer:0A00EB39)
Is this the kind of code I should be looking for?
By the way, there was a bit more about the pointers than I previously thought. The 7th bit of the pointer is only a "3" for offsets in the 0027XXXX range. For offsets in 0037XXXX range, it's a "7".
I don't think I can do anything with Atlas this way. But I suppose I can keep inserting the pointers manually. Since there's no math involved, it's not much trouble to write them.
For the moment, I'm more concerned about the font size in screen. So far, I've been unsuccesful trying to locate a font width table or anything like that.